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MULTIPLECHOICEQUESTIONS
Inthefollowingmultiple-choicequestions,pleasecirclethecorrectanswer.
1.Whichofthefollowingstatementsisfalse?
a.Allcalculationsarepermittedonintervaldata
b.Allcalculationsarepermittedonnominaldata
c.Themostimportantaspectofordinaldataistheorderofthedatavalues
d.Theonlypermissiblecalculationsonordinaldataareonesinvolvingarankingprocess
ANSWER:
b
2.Theaveragenumberofunitsearnedpersemesterbycollegestudentsissuspectedtoberising.AresearcheratBostonCollegewishestoestimatethenumberofunitsearnedbystudentsduringthespringsemesterof2004atBoston.Todoso,herandomlyselects250studenttranscriptsandrecordsthenumberofunitseachstudentearnedinthespringtermof2004.Thevariableofinteresttotheresearcheristhe
a.numberofstudentsenrolledatBostonCollegeduringthespringtermof2004
b.averageindebtednessofBostonCollegestudentsenrolledinthespring
c.ageofBostonCollegestudentsenrolledinthespring
d.numberofunitsearnedbyBostonCollegestudentsduringthespringtermof2004
d
3.Theclassificationofstudentmajor(accounting,economics,management,marketing,other)isanexampleof
a.acategoricalrandomvariable.
b.adiscreterandomvariable
c.acontinuousrandomvariable
d.aparameter.
ANSWER:
a
4.Astudyisunderwayinnationalforesttodeterminetheadultheightofpinetrees.Specifically,thestudyisattemptingtodeterminewhatfactorsaidatreeinreachingheightsgreaterthan50feettall.Itisestimatedthattheforestcontains32,000adultpines.Thestudyinvolvescollectingheightsfrom500randomlyselectedadultpinetreesandanalyzingtheresults.Thevariableofinterestinthestudyisthe
a.ageofapinetreeinthenationalforest.
b.heightofapinetreeinthenationalforest.
c.numberofpinetreesinthenationalforest.
d.speciesoftreesinthenationalforest.
5.Theclassificationofstudentclassdesignation(freshman,sophomore,junior,senior)isanexampleof
b.adiscreterandomvariable.
c.acontinuousrandomvariable.
6.Mostanalystsfocusonthecostoftuitionasthewaytomeasurethecostofacollegeeducation.Butincidentals,suchastextbookcosts,arerarelyconsidered.AresearcheratFerrisStateUniversitywishestoestimatethetextbookcostsoffirst-yearstudentsatFerris.Todoso,hemonitoredthetextbookcostof200first-yearstudentsandfoundthattheiraveragetextbookcostwas$275persemester.Thevariableofinteresttotheresearcheristhe
a.textbookcostoffirst-yearFerrisStateUniversitystudents.
b.yearinschoolofFerrisStateUniversitystudents.
c.ageofFerrisStateUniversitystudents.
d.costofincidentalexpensesofFerrisStateUniversitystudents.
7.Themanagerofthecustomerservicedivisionofamajorconsumerelectronicscompanyisinterestedindeterminingwhetherthecustomerswhohavepurchasedavideocassetterecordermadebythecompanyoverthepast12monthsaresatisfiedwiththeirproducts.Thepossibleresponsestothequestion“Areyouhappy,indifferent,orunhappywiththeperformanceperdollarspentonthevideocassetterecorder?
”arevaluesfroma
a.discretenumericalrandomvariable.
b.continuousnumericalrandomvariable
c.categoricalrandomvariable.
d.parameter.
c
TRUE/FALSEQUESTIONS
8.Thereareactuallyfourtypesofdata:
nominal,ordinal,interval,andratio.However,forstatisticalpurposes,thereisnodifferencebetweenintervalandratiodata,andtheauthorsofyourbookcombinethetwotypes.
T
9.Quantitativevariablesusuallyrepresentmembershipingroupsorcategories.
F
10.Intervaldata,suchasheights,weights,andincomes,arealsoreferredtoasquantitativeornumericaldata.
ANSWER:
T
11.Nominaldataarealsocalledqualitativeorcategoricaldata.
12.ATPsinglesrankingsfortennisplayersisanexampleofanintervalscale.
F
13.Intervaldatamaybetreatedasordinalornominal.
14.Nominaldatamaybetreatedasordinalorinterval
15.ProfessorHogggraduatedfromtheUniversityofIowawithacodevalue=2whileProfessorMaasgraduatedfromMichiganStateUniversitywithacodevalue=1.Thescaleofmeasurementlikelyrepresentedbythisinformationisinterval.
16.Ordinaldatamaybetreatedasintervalbutnotasnominal.
17.Avariableissomecharacteristicofapopulation,whiledataaretheobservedvaluesofavariablebasedonasample.
18.Anautomobileinsuranceagentbelievesthatcompany“A”ismorereliablethancompany“B”.Thescaleof